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  2. Mom begs parents to check for potentially-lethal button ... - AOL

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    Button batteries are the small, flat, round batteries generally used in portable devices that you’d find around the home. They are most commonly used in watches, car remotes, and hearing aids.

  3. Battery tester - Wikipedia

    en.wikipedia.org/wiki/Battery_tester

    Battery tester. A battery tester is an electronic device intended for testing the state of an electric battery, going from a simple device for testing the charge actually present in the cells and/or its voltage output, to a more comprehensive testing of the battery's condition, namely its capacity for accumulating charge and any possible flaws affecting the battery's performance and security.

  4. Battery nomenclature - Wikipedia

    en.wikipedia.org/wiki/Battery_nomenclature

    Round button batteries also carry two-digit size codes such as R44, see the button battery table for typical dimensions. Other round, flat, and square sizes have been standardized but are used mostly for components of multi-cell batteries. Assorted sizes of button and coin cells, including alkaline and silver oxide chemistries. Four rectangular ...

  5. Nine-volt battery - Wikipedia

    en.wikipedia.org/wiki/Nine-volt_battery

    The nine-volt battery, or 9-volt battery, is an electric battery that supplies a nominal voltage of 9 volts. Actual voltage measures 7.2 to 9.6 volts, depending on battery chemistry. Batteries of various sizes and capacities are manufactured; a very common size is known as PP3, introduced for early transistor radios. The PP3 has a rectangular ...

  6. Button cell - Wikipedia

    en.wikipedia.org/wiki/Button_cell

    Button, coin, or watch cells. A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.

  7. Silver oxide battery - Wikipedia

    en.wikipedia.org/wiki/Silver_oxide_battery

    A silver oxide battery (IEC code: S) is a primary cell using silver oxide as the cathode material and zinc for the anode. These cells maintain a nearly constant nominal voltage during discharge until fully depleted. [ 2 ]

  8. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threa­ded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.

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